Which of the following property is generally not shown by metals?
Electrical conduction
Sonorous in nature
Dullness
Ductility
The ability of metals to be drawn into thin wire is known as
ductility
malleability
sonorousity
conductivity
Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?
(i) Good thermal conductivity
(ii) Good electrical conductivity
(iii) Ductility
(iv) High melting point
(i) and (ii)
(i) and (iii)
(ii) and (iii)
(i) and (iv)
Which one of the following metals do not react with cold as well as hot water?
Na
Ca
Mg
Fe
Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron with steam?
FeO
Fe2O3
Fe3O4
Fe2O3 and Fe3O4
What happens when calcium is treated with water?
(i) It does not react with water
(ii) It reacts violently with water
(iii) It reacts less violently with water
(iv) Bubbles of hydrogen gas formed stick to the surface of calcium
(i) and (iv)
(ii) and (iii)
(i) and (ii)
(iii) and (iv)
Generally metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals (except Mn and Mg)?
H2SO4
HCl
HNO3
All of these
The composition of aqua regia is
Dil. HCl 3 : Conc. HNO3 1
Conc. HCl 3 : Dil. HNO3 1
Conc. HCl 3 : Conc. HNO3 1
Dil. HCl 3 : Dil. HNO3 1
Which of the following are not ionic compounds?
(i) KCl
(ii) HCl
(iii) CCl4
(iv) NaCl
(i) and (ii)
(ii) and (iii)
(iii) and (iv)
(i) and (iii)
Which one of the following properties is not generally exhibited by ionic compounds?
Solubility in water
Electrical conductivity in solid state
High melting and boiling points
Electrical conductivity in molten state
Which of the following metals exist in their native state in nature?
(i) Cu
(ii) Au
(iii) Zn
(iv) Ag
(i) and (ii)
(ii) and (iii)
(ii) and (iv)
(iii) and (iv)
Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining?
(i) Au
(ii) Cu
(iii) Na
(iv) K
(i) and (ii)
(i) and (iii)
(ii) and (iii)
(iii) and (iv)
Silver articles become black on prolonged exposure to air. This is due to formation of
Ag3N
Ag2O
Ag2S
Ag2S and Ag3N
Galvanisation is a method of protecting iron from rusting by coating with a thin layer of
Gallium
Aluminium
Zinc
Silver
Stainless steel is very useful material for our life. In stainless steel, iron is mixed with
Ni and Cr
Cu and Cr
Ni and Cu
Cu and Au
If copper is kept open in air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of
CuSO4
CuCO3
Cu(NO3)2
CuO
Generally, metals are solid in nature. Which one of the following metals is found in liquid state at room temperature?
Na
Fe
Cr
Hg
Which of the following metals are obtained by electrolysis of their chlorides in molten state?
(i) Na
(ii) Ca
(iii) Fe
(iv) Cu
(i) and (iv)
(iii) and (iv)
(i) and (ii)
(i) and (ii)
Which of the following statements are correct for magnesium?
(i) It burns in oxygen with a dazzling white flame
(ii) It reacts with cold water
(iii) It reacts with hot water
(iv) It reacts with steam
(i) and (ii)
(i) and (iii)
(i) and (iv)
(iii) and (iv)
Which among the following alloys contain mercury as one of its constituents?
Stainless steel
Alnico
Solder
Zamcudum amalgam
An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be
calcium
carbon
silicon
iron
Food cans are coated with tin and not with zinc because
zinc is costlier than tin
zinc has a higher melting point than tin
zinc is more reactive than tin
zinc is less reactive than tin
A metal that exists in the liquid state at room temperature is
Na
K
Hg
Ca
Which of the following metals is preserved in kerosene?
Na
Ca
Mg
Al
Which of the following gives the correct increasing order of reactivity?
Mg > Al > Zn > Fe
Fe > Zn > Al > Mg
Zn > Fe > Mg > Al
Al > Zn > Mg > Fe
Galvanised iron sheets are coated with a layer of
Al
Zn
Sn
Cu
Bronze is an alloy of
Cu and Sn
Cu and Zn
Cu and Ni
Cu and Al
The metal used for making filaments of bulbs is
Cu
Fe
Al
W
Which of the following metals is the most reactive?
Cu
Mg
Na
Zn
Which of the following metals will displace hydrogen from steam?
Zn
Mg
Sn
Fe
Which of the following metals cannot be obtained by reduction of their oxides with carbon?
Zn
Al
Fe
Pb
An iron nail is kept immersed in copper sulphate solution. The solution will turn
blue
green
yellow
colorless
Which of the following metals will not replace hydrogen from acids?
Zn
Al
Cu
Mg
Which of the following set of reactions will occur?
(i) Zn + CuSO4 → ?
(ii) Fe + CuSO4 → ?
(iii) Cu + FeSO4 → ?
(iv) Zn + FeSO4 → ?
(i), (ii), (iii)
(i), (ii), (iv)
(ii), (iii), (iv)
(i), (iii), (iv)
Which of the following metals occurs in native state?
Na
Zn
Au
Al
Which of the following metals produces hydrogen gas on reaction with nitric acid?
Zn
Cu
Ag
Au